Electromotive valves from Bürkert
Electromotive valves are ideal for the accurate dosing of products. Unlike pneumatic valves, electromotive models aren’t influenced by process pressures. Nor do they require compressed air or a PLC. Electromotive valves can be daisy chained using our Efficient Device Integration Platform (EDIP) for easy installation. All of which makes them a more cost-effective option for any dosing system application.
Advantages of electromotive valves
The main advantages of electromotive valves are their accuracy and ease of control. Electromotive control valves utilise a stepper motor that delivers unrivalled performance compared to anything else on the market. Other similar products use rotary motors that are slow and sluggish, meaning some valves can be slow to turn. Electromotive valves are among the fastest on the market.
Wherever companies need to ensure that they are accurately dosing product, electromotive valves offer unrivalled dosing control. Pneumatic valves have to compensate for the pneumatic feed that controls the valve and its position. If the valve is required to close a certain degree, it has to emit air to enable the spring to overcome the pressure of the line.
Sometimes a pneumatic valve can overshoot. As such, it then has to re-introduce air to return the spring to the correct position. In contrast, when an electromotive valve is required to move to a certain position, it simply winds its motor the desired number of times in order to reach the appropriate position. The upshot is fast and precise control, each and every time.
Accurate and reliable electromotive control valves
Line pressure against the valve from the process itself can also play a factor. Fluctuating pressures mean that a pneumatic valve has to overcompensate. Electromotive valves feature a pair of permanent magnets that hold the position of the valve in place. This provides a consistently accurate and error-free process, which is vital in dosing applications.
In the event of a power outage, pneumatic valves will default based on the spring position – whether it is normally open or normally closed. An electromotive control valve has a series of super-capacitors that hold the charge. In a power outage situation you can select whether you would like it to default open, closed or anywhere in between – providing a huge amount of flexibility.
Reduced hardware, cabling and installation costs
Bürkert electromotive valves boast proportional integral derivative (PID) facilities on board. For applications involving a small control loop, outside of a factory and away from compressed air lines for example, a signal can be sent directly from a sensor to the valve. Therefore a small, localised control system can be created without the need for compressed air lines or indeed a PLC.
Furthermore, our non-proprietary EDIP CANopen-based system makes it possible to link multiple electromotive control valves together. This ultimately reduces hardware, cabling and installation costs for the end user. From a commissioning point of view, this also simplifies things greatly because you can view all of your devices from one single computer or PLC.
For more information about our electromotive valve products, or to discuss you application requirements in more detail, please contact the Bürkert UK sales team today on +44 (0) 1285 648 720 or email [email protected].
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